The council shall maintain and make available for public inspection an index of those classes of records described in RCW 42.17.260. The index is available for public inspection and copying.

(1) Form and content. The index shall be maintained in electronic form with copies available on paper. The index shall contain topic headings.

(2) Location and availability. The index shall be available to the public under the same rules and on the same conditions as are applied to other public records.

(3) Schedule for revisions and updates. The council shall revise and update the index annually.